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PETER HOFFMAN, 0F JERSEY CTY, NEW ERSEY.

Letters Patent No. 63,250, dated Zlarc/b 26, 1867.

MPROVED TOOL 'FOR CUTTING OFF BLER TUBES.

TO ALL WHOM IT MAY CONGERN:

Be it known that I, PETER HOFFMAN, of Jersey City, in the county of Hudson, and Stute of New Jersey, have invented anew and improved Tool for Cutting Boiler Tubes; and l do hereby declare that the following is u full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference beingl had to the accompanying drawings forming part of this speeicntion, in which- Figure 1 represents a longitudinal central section of this invention.

Figure 2 is a transverse section of the same, talien in the plane indicated by the line :z: ft, tig. Ll.

Similar letters ci;v reference indicate like parts.

This invention relates to e tool for cutting boiler tubes, which is composed of a split or sectional bar, one end of which is made to iit the tube to be cut, While the other end, which carries the cutter, is open to receive a wedge in such a manner that when the cutter bor is inserted in the tube to he cut, and the VWedge is placed in its slotted end, the points or teetli of the cutter catch in the inner surl'ece of the tube, Vund by turning the wedge and cutter bar and driving said `wedge in gradually the tube is cut in e. short time and Without producing the least jar on thev joints of the boiler. A

A represents a bar, made of steel or any other suitable materiel. One end o' this ber is provided `with i. boss, ,jnst thick enough to tit the tube to be cut, and of any' suitable length to steady the bur during the operation of cutting. From the boss extends the shank or body oi the ber, the diameter of which is 4lese than that of the bore of the tube, and on the cuter end of this ber are formed the teeth e, or e. suit'eble cutter may be secured to said hei-i The body of the bar is provided with e. long slot, which is capable of receiving the wedge B, so that by inserting this wedge the ba-r een be expanded. it. must be remarked thetthe bnr, instead of being slotted, might be made in two sections, of such u shape' that they ferm s siot to admit the wedge stone end,- and that they can be rrnly united by e. sleeve or screw thiinble placed over their opposite ends, seid sleeve lor screw thinible being of such u thickness 'that it ts the tube to he cut. rEllis arrangement I would consider a. mechanical equivalent oi' the bar shown in the drawing. in order to cnt u. tube the bar'A is inserted thereon, ns shown in iig. Il of the drawing, until the peints of the cutter are opposite the spot Where it is to Y'take eiibct. vBy inserting `the wedge B the points of the cutter are made to bite in the inner surface of the tube, snd- 1hy-turniug the wedge with e. ratchet-bruce or wrench and tapping it et suitable intervals with a mullet or hammer, the operation of cutting the. tube is etlected. lt is obvious thet with my tool the tube can be eut Aet any desire-ble spot, though it is intended particularly for cutting o the ends of boiler tubes previous to securingthe same in the tube sheet, an operation which, with the tools es non' used, requires much time and labor.

What claim as new, end desire tc secure by Letters Patent, ism- A tool for cutting boiler tubes, which is composed of e. split or sectional ber, fl., provided et cue end `with o. bossue, and at theopposite end with teeth e, to operate in combination with a wedge, B, substantially :is and for the purpose set forth. r

The nbove specification of my invention signed by me this sixth dey of November, 1865.

I PETER HOFFMAN.

Witnesses:

W. Hiver, ALEX. F. llonnn'rs. 

